PBI-Gordon unveils new Arkon liquid herbicide for sedges, kyllinga and more

Arkon Herbicide Liquid from PBI-Gordon has been approved for use in most U.S. states (excluding California and Alaska). The U.S. Environmental Protection Agency (EPA) previously approved Federal registration for the herbicide.

Arkon is labeled for use on established cool- and warm-season turfgrass species across golf course greens, fairways and roughs. According to PBI-Gordon, the herbicide will be available for sale nationwide in 2024 and be included in PBI-Gordon’s Green Dividends Early Order Program in fall 2023.

Utilizing the active ingredient Pyrimisulfan, Arkon provides post-emergent control of sedges (yellow, purple and annual), kyllinga (green false green, cockscomb and annual), dollar weed, chickweed, henbit and many other labeled broadleaf weeds according to the company. Additionally, research has shown that the liquid herbicide reduces the number and viability of nutsedge tubers.

The application rate is as follows:

• 1.2 to 1.7 fl. oz. per 1,000 sq. ft. (3.4 to 4.7 pt. per acre).
• The maximum annual use rate is 2.5 fl. oz. per 1,000 sq. ft. (7 pt. per acre, per year).
• For harder-to-control weeds, two applications at the 1.2 fl. oz. per 1,000 sq. ft. rate at 30 apart should be considered.

Arkon’s active ingredient Pyrimisulfan is the result of an exclusive partnership between PBI-Gordon, Kumiai Chemical and its U.S. subsidiary K-I Chemical.